Most Active Speakers 2025

Sessionize proudly presents the list of the most active speakers in the year 2025!

  • 1125 speakers
  • Auto-generated
Johnny Hooyberghs

Johnny Hooyberghs

Johnny Hooyberghs is a managing partner and consultant for Involved NV, part of the Cronos group, since 2014 focusing on software architecture, backend development and a Microsoft Most Valuable Professional for Azure and Developer Technologies since 2020. Prior to joining Involved as a consultant, he has had experience developing software for the health-care sector since 2008. Johnny has been passionate about software development using the .NET stack, cloud native development using the Microsoft Azure cloud stack and quantum computing. Johnny has spent 10 years of his free time teaching software development courses for the adult education institute CVO Antwerpen and has been enjoying public speaking these past 6 years. When Johnny is not working, he likes to spend his time on self-education, quantum computing, some casual video gaming, travelling the world and visiting as many theme parks as possible.

Johnny Hooyberghs is a managing partner and consultant for Involved NV, part of the Cronos group, since 2014 focusing on software architecture, backend development and a Microsoft Most Valuable Professional for Azure and Developer Technologies since ... Show more

Mar Lizana

Mar Lizana

Creo firmemente en el poder de los datos para cambiar realidades y en la importancia de seguir explorando nuevas formas de maximizar su impacto. Si quieres conectar o saber más sobre mi trabajo, puedes visitar mi blog en Medium https://medium.com/@akanemar

I firmly believe in the power of data to transform realities and in the importance of continuously exploring new ways to maximize its impact. If you'd like to connect or learn more about my work, feel free to visit my blog on Medium: https://medium.com/@akanemar

Creo firmemente en el poder de los datos para cambiar realidades y en la importancia de seguir explorando nuevas formas de maximizar su impacto. Si quieres conectar o saber más sobre mi trabajo, puedes visitar mi blog en Medium https://medium.com/@ak... Show more

Kevin Dubois

Kevin Dubois

Kevin Dubois is often featured as a (keynote) speaker at conferences around the world, where he shares his passion and knowledge about developer experience, open source, cloud native development and Java. He is also an author, java Champion, and an accomplished software architect and platform engineer. Kevin currently works as a Senior Principal Developer Advocate at IBM, and is also Technical Lead for the CNCF Developer Experience Technical Advisory Group.

Multilingual and multicultural, Kevin speaks English, Dutch, French, and Italian fluently. Currently based in Switzerland, he has also lived in Belgium, Italy, Montana and Utah.
When he’s not coding or speaking at conferences, you’ll likely find Kevin exploring the great outdoors—whether he's hiking rugged trails, gravel biking through scenic routes, snowboarding down epic mountain slopes, or packrafting & kayaking on untamed waters.

Kevin Dubois is often featured as a (keynote) speaker at conferences around the world, where he shares his passion and knowledge about developer experience, open source, cloud native development and Java. He is also an author, java Champion, and an a... Show more

Daniel Hutmacher

Daniel Hutmacher

SQL Server developer for 25-odd years, Microsoft Data Platform MVP, Redgate Community Ambassador, organizer of Data Saturday Stockholm and Stockholm SQL, volunteer/co-organizer of GroupBy.org. I still occasionally blog at sqlsunday.com.

SQL Server developer for 25-odd years, Microsoft Data Platform MVP, Redgate Community Ambassador, organizer of Data Saturday Stockholm and Stockholm SQL, volunteer/co-organizer of GroupBy.org. I still occasionally blog at sqlsunday.com. Show more

Dennis Doomen

Dennis Doomen

Dennis is a Microsoft MVP and Principal Consultant at Dutch Microsoft consultancy firm Aviva Solutions. With 29 years of experience under his belt as a software architect and/or lead developer, he specializes in designing full-stack enterprise solutions based on .NET as well as providing coaching on all aspects of designing, building, documenting, deploying and maintaining software systems in an agile world. He is the author of several open-source projects, including Fluent Assertions, Pathy, Reflectify, PackageGuard, and several .NET Solution Templates, and has been maintaining coding guidelines for C# since 2001. You can find him on Twitter, Mastodon and BlueSky.

Dennis is a Microsoft MVP and Principal Consultant at Dutch Microsoft consultancy firm Aviva Solutions. With 29 years of experience under his belt as a software architect and/or lead developer, he specializes in designing full-stack enterprise soluti... Show more

Alex Shershebnev

Alex Shershebnev

Alex Shershebnev is a seasoned AI engineer and technology leader with over a decade of experience in AI, DevOps and MLOps. He is currently Lead DevRel at Zencoder, an AI coding assistant, and one of the founding members of the company, where he has spent the last two years shaping both the product and its developer ecosystem. Alex has spoken at more than 50 international conferences, establishing himself as a recognized voice on AI for coding, secure and responsible use of AI in software development, and the future of developer workflows.

At Zencoder, Alex has led ML/DevOps and infrastructure initiatives focused on building scalable, production-grade AI systems. He brings deep expertise in software engineering, cloud infrastructure (GCP, Kubernetes), large-scale GPU platforms, and end-to-end ML/DevOps pipelines that enable data scientists to iterate quickly while reducing operational complexity and cost.

Before Zencoder, Alex held key technical leadership roles at companies like Sanas, ivi, and MTS AI, working across domains including bioinformatics, video analysis, voice, NLP, and recommendation systems. His background ranges from academic research at the University of Massachusetts to designing and operating complex cloud infrastructures that scale to hundreds of GPUs.

Combining deep hands-on engineering experience with a strong focus on developer experience and community building, Alex is known for translating complex technical challenges into clear, actionable insights. Whether speaking about DevOps and MLOps at scale, AI-powered developer workflows, or lessons learned from building real-world AI platforms, he brings a unique combination of technical depth, industry experience, and passion for building systems and communities that scale.

Alex Shershebnev is a seasoned AI engineer and technology leader with over a decade of experience in AI, DevOps and MLOps. He is currently Lead DevRel at Zencoder, an AI coding assistant, and one of the founding members of the company, where he has s... Show more

Jared Kuehn

Jared Kuehn

Currently a Microsoft Data Platform MVP, Jared has been a data engineering consultant for over a decade, implementing Microsoft products. For more than three decades, he has been honing his skills in theater and other performing arts. As a speaker, Jared marries these two disciplines together, creating dynamic presentations that add entertainment to education. This symbiotic relationship can improve presentation engagement, support attendees in knowledge retention, and foster a culture of passion for the data industry.

As a speaker, Jared has spoken at events such as:
-FabCon Vegas and Atlanta
-DataCon Seattle (Microsoft Data Conference)
-PASS Summit
-SQL Saturdays, Multiple
-Microsoft Fabric Global Online Conference
-Future Data Driven Summit
-GroupBy Conference
-and more!

He also runs the YouTube channel DataBard, focused on making Data fun and teaching techniques along the way.

Technically-speaking, Jared has multiple Microsoft certifications in both on-prem and cloud technologies. He has extensive knowledge in:
-Microsoft Fabric
-SQL Query Development and Performance tuning
-Kimball Data Modeling
-ETL design patterns
-Azure SQL DB and Azure SQL MI

In his spare time, he continues to perform in community theater productions, as well as musically for his church. Upon request, he would be happy to assist with more theatrical portions of events, such as performing musical numbers.

Currently a Microsoft Data Platform MVP, Jared has been a data engineering consultant for over a decade, implementing Microsoft products. For more than three decades, he has been honing his skills in theater and other performing arts. As a speaker, J... Show more

Dr. Joe Perez

Dr. Joe Perez

Dr. Joe Perez is a game-changing professional who has made an impressive impact on the world of IT, health & human services, and higher education. With advanced degrees in education, Joe started his career as an educator and continued to further his education by earning a doctorate in education with a double minor in computers and theology. His career focus changed to IT in the early 1990’s when he started working as a Computer Consultant at NC State University. Three promotions later, Dr. Perez ended his successful 25-year career at NC State as Business Intelligence Specialist when he took another promotion to become Senior Business Analyst at the NC Department of Health & Human Services (DHHS) in the fall of 2017.

Notably, Dr. Perez has been featured on multiple billboards in the iconic Times Square, a testament to his remarkable achievements and influence worldwide. This recognition, along with his Top 10 Global Thought Leader Rankings in IT Strategy & Big Data on Thinkers360 (2023 through 2025) and Gartner Peer Community Ambassador of the Year (2023-2024), reflect his dedication and impact in the industry.

Having achieved significant success throughout his career, Dr. Perez's accomplishments include being promoted to Senior Systems Specialist and Team Leader, a position he has excelled in while showcasing his expertise and leadership skills. In addition to his full-time analytics/BI leadership role at DHHS, Joe was named fractional Chief Technology Officer at a North Carolina firm in October 2020 and Strategy Director at InnovoraMind in March 2026. A prolific, Amazon bestselling author with multiple #1 new releases, more than 21,000 followers on LinkedIn, and several professional certifications, he has consistently proven to be a much sought-after resource, highly-recommended international keynote speaker, data analytics & visualization expert, and specialist in efficiency and process improvement.

Perez, a recipient of the IOT Industry Insights 2021 Thought Leader of the Year award, speaks at numerous conferences each year, and continues to be in high demand to this day, expanding his reach into dozens of countries around the globe, impacting thousands. Thanks to these outstanding accomplishments and influential presence as a leading expert in the industry, Dr. Perez has been welcomed into several prestigious Thought Leader communities. He was recently inducted into the United Nations Global Network of Data Officers and Statisticians and was selected to be a Distinguished Fellow in the Public Sector Network's Future Government Institute.

Dr. Perez's passion for teaching has never waned, whether as a speaker, workshop facilitator, podcast guest, conference emcee, or team leader; inspiring countless individuals to strive for excellence. He cherishes spending time with his wife and children, who he considers to be the "best things that ever happened to me." Besides being a gifted musician, singer, pianist, and composer, Joe serves in his church's Hispanic ministry. He even manages to publish a monthly military newsletter, The Patriot News, which has gained widespread recognition. His unwavering commitment to his community is an inspiration to all. To stay in shape, Perez hits the gym, and he loves watching Star Trek reruns to relax. "I'm a firm believer that if I'm not innovating, then I'm stagnating," says Joe. His devotion to innovation, his boundless energy, and his constant drive for excellence are the hallmarks of a truly exceptional individual, thus making Dr. Joe a perfect fit to inspire and engage your audience, leaving a lasting impact on your event.

Dr. Joe Perez is a game-changing professional who has made an impressive impact on the world of IT, health & human services, and higher education. With advanced degrees in education, Joe started his career as an educator and continued to further his ... Show more

Satish Upadhyaya

Satish Upadhyaya

I am a Chief Level Microsoft 365 Architect and recognized Microsoft MVP for Teams and Microsoft 365 Copilot, bringing 12+ years of leadership in architecting, securing, and deploying complex Microsoft 365 solutions for Federal, State, and Local Government agencies and large Enterprise Customers. My core mandate is solving technically intricate Microsoft requirements involving compliance and cross-platform integration.

My expertise spans the entire solution lifecycle, from rigorous presales TCO analysis and high-assurance security design to global deployment and measurable user adoption. I specialize in environments requiring stringent security and compliance postures (e.g., GCC, GCC High, DoD requirements).

Core Technical & Domain Leadership:
• Advanced UC Architecture: Expertise in solving complex PSTN requirements globally, utilizing Operator Connect, Direct Routing (SBC/SIP trunk configuration, media bypass), and migration strategies from legacy voice platforms. I specialize in integrating Zoom and Cisco Experience (CUCM, Webex) environments with Teams via CVI and interop gateways.
• AI and Custom Development: Leading the technical implementation of Generative AI productivity tools. This includes leveraging Copilot Studio for low-code/no-code custom bot creation, sophisticated data connection configuration, and architecting the secure deployment of Copilot Chat across restricted tenants.
• Compliance & Telecom Expertise: Deep-dive technical knowledge of global telecom regulations, including E.164 normalization, emergency calling (E911/NextGen 911), and Lawful Intercept requirements. This expertise ensures technical compliance and de-risks deployment across diverse regulatory jurisdictions for both government and enterprise clients.
• M365 Security & Governance: Architecting security and compliance baselines using Purview, Entra ID (conditional access, MFA), and Defender to meet specific governmental and highly regulated industry standards while maintaining user productivity.

I serve as a high-impact technical leader, driving innovation, securing mission-critical communications, and translating complex architectural diagrams into successful, compliant business outcomes for the world's most demanding organizations.

I am a Chief Level Microsoft 365 Architect and recognized Microsoft MVP for Teams and Microsoft 365 Copilot, bringing 12+ years of leadership in architecting, securing, and deploying complex Microsoft 365 solutions for Federal, State, and Local Gover... Show more

Julien Topçu

Julien Topçu

Julien is a hands-on CTO with 15 years of experience, specializing in Domain-Driven Design (#DDD). His expertise lies in helping organizations build systems that deliver high business value. Julien focuses on aligning organizational structure, architecture and software practices with business objectives. As a member of the OWASP foundation, he actively promotes application security best practices. An international speaker, Julien enjoys sharing his knowledge with others.

Julien is a hands-on CTO with 15 years of experience, specializing in Domain-Driven Design (#DDD). His expertise lies in helping organizations build systems that deliver high business value. Julien focuses on aligning organizational structure, archit... Show more

Daniel Afonso

Daniel Afonso

Daniel Afonso is a Senior Developer Advocate at PagerDuty, SolidJS DX team member, Instructor at Egghead.io, and Author of State Management with React Query. Daniel has a full-stack background, having worked with different languages and frameworks on various projects from IoT to Fraud Detection. He is passionate about learning and teaching and has spoken at multiple conferences around the world about topics he loves. In his free time, when he's not learning new technologies or writing about them, he's probably reading comics or watching superhero movies and shows.

Daniel Afonso is a Senior Developer Advocate at PagerDuty, SolidJS DX team member, Instructor at Egghead.io, and Author of State Management with React Query. Daniel has a full-stack background, having worked with different languages and frameworks on... Show more

Just Blindbæk

Just Blindbæk

BI architect with extensive experience in all phases of BI development on Microsoft SQL Server, Azure, Fabric and Power BI. Founder and coordinator of Microsoft Business Intelligence Professionals Denmark (MsBIP.dk) and Power BI UG Denmark (PowerBI.dk). Is a Microsoft Certified Trainer.

BI architect with extensive experience in all phases of BI development on Microsoft SQL Server, Azure, Fabric and Power BI. Founder and coordinator of Microsoft Business Intelligence Professionals Denmark (MsBIP.dk) and Power BI UG Denmark (PowerBI.d... Show more

Eberhard Wolff

Eberhard Wolff

Eberhard Wolff has 20+ years of experience as an architect and consultant - often on the intersection of business and technology. He is Head of Architecture at SWAGLab. As a speaker, he has given talks at international conferences and as an author, he has written more than 100 articles and books e.g. about Microservices and Continuous Delivery. His technological focus is on modern architectures – often involving Cloud, Domain-driven Design, and Microservices.

Eberhard Wolff has 20+ years of experience as an architect and consultant - often on the intersection of business and technology. He is Head of Architecture at SWAGLab. As a speaker, he has given talks at international conferences and as an author, h... Show more

Sammy Deprez

Sammy Deprez

Sammy is a seasoned consultant with an extensive background in diverse industries and over a decade of experience. With a specialization in the Microsoft Stack, he has successfully undertaken and delivered numerous projects across sectors such as finance, healthcare, and beyond.

In 2015, Sammy made a significant shift in his career by redirecting his focus towards Machine Learning and Artificial Intelligence (AI). Recognizing the transformative potential of these emerging technologies, he dedicated himself to mastering their applications and staying at the forefront of the field. His deep understanding of AI and its practical implications has allowed him to contribute significantly to the advancement of organizations he has been involved with.

In 2017, Sammy played a pivotal role in the launch of a new company that specializes in leveraging Artificial Intelligence and Microsoft tools to maximize organizations' potential. His expertise and leadership were instrumental in establishing the company as a prominent player in the AI landscape. Through his strategic insights and hands-on involvement, Sammy has helped numerous businesses harness the power of AI to drive innovation, improve operational efficiency, and achieve sustainable growth.

Beyond his professional endeavors, Sammy is a passionate advocate for AI education and community building. He serves as a board member of the global AI community, where he actively contributes to fostering collaboration, knowledge sharing, and networking opportunities among professionals in the field. As an esteemed international speaker, Sammy frequently shares his expertise and insights at industry conferences, seminars, and workshops, inspiring and educating audiences about the transformative potential of AI.

Sammy's commitment to excellence and his contributions to the AI community have been recognized with the prestigious MVP (Most Valuable Professional) award in AI since 2021. This accolade further underscores his dedication, expertise, and impact in the field, cementing his position as a trusted advisor and thought leader in the intersection of AI and business.

With his vast experience, deep knowledge, and unwavering passion for AI, Sammy continues to shape the future of organizations by unlocking their potential through cutting-edge technologies, and inspiring others to embark on their own AI journeys.

Sammy is a seasoned consultant with an extensive background in diverse industries and over a decade of experience. With a specialization in the Microsoft Stack, he has successfully undertaken and delivered numerous projects across sectors such as fin... Show more

Sally Dabbah

Sally Dabbah

Meet Sally! Sally serves as a Data Engineer with an expertise in Azure Cloud Analytics Services, with years of experience under her belt.
Since earning her M.Sc. degree in Software Engineering, Sally has become a significant voice in Azure Cloud Analytics Services, publishing over ten blogs on Microsoft's Tech Community blog. What excites Sally most about her work is the opportunity to build Proof of Concepts (POCs) that help Microsoft customers unlock their business potential – by doing so, she remains true to her ultimate mission: to empower innovation through Azure's boundless possibilities. Away from her professional endeavors, Sally finds joy in baking pastries, a hobby she shares with her followers on Instagram for inspiration.

Meet Sally! Sally serves as a Data Engineer with an expertise in Azure Cloud Analytics Services, with years of experience under her belt. Since earning her M.Sc. degree in Software Engineering, Sally has become a significant voice in Azure Cloud An... Show more

Nikos Delis

Nikos Delis

Microsoft Certified x6, MVP for Azure & IoT, Senior Cloud Architect and tech enthusiast. Passionate about software architecture and solution design.

During my 10+ years of hands-on experience in Software Engineering, I have primarily focused on .NET-based solutions and Azure as a cloud-services provider. I have worked with pretty much all kinds of applications, from small Windows Forms tools to large-scale enterprise web-based solutions. The more I code, the more I realize that my true passion is solution design and software architecture, regardless of tech-stack and platform.

Sharing knowledge and insights is the finest thing I know and the one thing I love the most in the IT community.

Microsoft Certified x6, MVP for Azure & IoT, Senior Cloud Architect and tech enthusiast. Passionate about software architecture and solution design. During my 10+ years of hands-on experience in Software Engineering, I have primarily focused on .N... Show more

Mohamed Mortadha Manai

Mohamed Mortadha Manai

Senior AI Engineer |Phd Candidate in xAI | AI Expert Consultant | AI Expert Author | International AI Speaker

Senior AI Engineer |Phd Candidate in xAI | AI Expert Consultant | AI Expert Author | International AI Speaker Show more

Neel Bhatt

Neel Bhatt

Neel is a tech enthusiast, blogger, writer, speaker, and solutions architect. He has 10 years of professional experience. Apart from being a developer, he is an award-winning tech blogger. He likes to stay up-to-date with the latest technology stack, and he likes to share his knowledge with the community. He often arranges RTL meetups to share knowledge. He is a DZone MVB and Top 4% overall on the StackOverflow site. You can find him at his site: https://neelbhatt.com

Neel is a tech enthusiast, blogger, writer, speaker, and solutions architect. He has 10 years of professional experience. Apart from being a developer, he is an award-winning tech blogger. He likes to stay up-to-date with the latest technology stack,... Show more

Louëlla Creemers

Louëlla Creemers

Louëlla Creemers is a software developer from the Netherlands focusing on .NET, C#, and modern web technologies. She is active in the developer community as a teacher, content creator, blogger, and public speaker, with a focus on making advanced or new topics accessible to developers at all stages of their careers. Online, she enjoys sharing educational content and the occasional joke with an audience of over 30,000 developers.

Through her community involvement, Louëlla was awarded the Microsoft MVP title in 2023 in the Developer Technologies category. She is also a board member of the .NET Foundation and a mentor for her local CoderDojo.

Louëlla Creemers is a software developer from the Netherlands focusing on .NET, C#, and modern web technologies. She is active in the developer community as a teacher, content creator, blogger, and public speaker, with a focus on making advanced or n... Show more

Andrew Madson

Andrew Madson

Andrew Madson leads Developer Relations at Fivetran, where he builds global programs that help developers and data teams adopt modern data and AI tooling. He has built DevRel, education, and evangelism functions at Fivetran, Tobiko Data, and Dremio, delivering technical content, large-scale community programs, and keynotes across major industry conferences.

Andrew is a published author of the O’Reilly “Definitive Guide to Apache Polaris” and a graduate professor of data science and engineering. Andrew previously led AI and data teams at Arizona State University, J.P. Morgan Chase, and MassMutual among others.

Andrew Madson leads Developer Relations at Fivetran, where he builds global programs that help developers and data teams adopt modern data and AI tooling. He has built DevRel, education, and evangelism functions at Fivetran, Tobiko Data, and Dremio, ... Show more

Pradeep Sharma

Pradeep Sharma

Pradeep is as old as the internet but he didn’t have reliable access to the electricity or the internet until he entered IIT Roorkee where he studied electronics and programming. His interest in programming grew more after his work as a Computer Science Researcher at L3S Research Center (Germany) and Sabanci University (Istanbul). His newfound passion and early successes propelled him into a career as a developer.

Throughout his 14+ years of career, Pradeep developed applications in diverse domains such as dev productivity, privacy, neural search, authentication, NLP, cryptography, data engineering, etc.

Pradeep founded two startups, authored a book, and published #OpenSourceDiscovery newsletter. For 8 years, Pradeep developed and maintained his key project - Developer Diary, a cross-platform productivity tool for developers. This long-term commitment provided him with deep insights into the evolution of various engineering and community functions. Leveraging these insights, he guided various Open Source organizations to create category-leading developer tools and foster thriving, engaged developer communities.

As a late bloomer in tech from a small town, he witnessed how the internet empowered developers from remote areas to transform their lives. This inspired him to found Invide, an invitation-only community for developers from underserved regions. Drawing from his own journey, the initiative helped over 15000 experienced developers with resources he once lacked.

Pradeep is as old as the internet but he didn’t have reliable access to the electricity or the internet until he entered IIT Roorkee where he studied electronics and programming. His interest in programming grew more after his work as a Computer Scie... Show more

Chen Shiri

Chen Shiri

Chen Shiri is a cyber security researcher, hacker, known for his research on low-level security and isolation mechanisms. His research has revealed significant flaws within widely-used services and prominent vendors. In addition to its research on Accenture, he published research with early examples of weaknesses in microservices and container-based web apps.

Chen Shiri is a cyber security researcher, hacker, known for his research on low-level security and isolation mechanisms. His research has revealed significant flaws within widely-used services and prominent vendors. In addition to its research on ... Show more

Taswar Bhatti

Taswar Bhatti

Taswar Bhatti works for Microsoft as AI Security Cloud Solutions Architect. Prior to his current position he also worked as a Solutions Architect for AWS, his focus areas are security and machine learning. He holds a BSc in Mathematics and Computing Science from University of Alberta, and is well versed in architectural design, security and building large scale security web applications; not to mention he was a Microsoft MVP for 8 years.

Taswar is also fluent in many spoken languages: Cantonese, English, Turkish, and Urdu/Hindi.

Taswar Bhatti works for Microsoft as AI Security Cloud Solutions Architect. Prior to his current position he also worked as a Solutions Architect for AWS, his focus areas are security and machine learning. He holds a BSc in Mathematics and Computing... Show more

Lukas Durovsky

Lukas Durovsky

Staff Software Engineer with 10+ years of experience, currently working at Thermo Fisher Scientific. Interested in Domain-Driven Design and System Architectures. Passionate about leveraging AI to drive innovative solutions. Actively involved in the software engineering community, conducting workshops, talks, and lectures on topics such as GitHub Copilot and other topics from software engineering area.

Staff Software Engineer with 10+ years of experience, currently working at Thermo Fisher Scientific. Interested in Domain-Driven Design and System Architectures. Passionate about leveraging AI to drive innovative solutions. Actively involved in the s... Show more

Christian Henrik Reich

Christian Henrik Reich

Sr. Solution Architect at Microsoft. I started programming as a kid and never stopped. I have worked across everything from embedded systems to large‑scale data platforms. My work over the past decade has focused on Data and AI with a strong emphasis on Microsoft Fabric, SQL Server, Databricks, cloud‑scale architectures, modern data engineering, and Machine Learning. I volunteer teaching AI and Machine Learning, and I’m currently writing “The Data Engineer’s Guide to Microsoft Fabric” for O’Reilly.

Sr. Solution Architect at Microsoft. I started programming as a kid and never stopped. I have worked across everything from embedded systems to large‑scale data platforms. My work over the past decade has focused on Data and AI with a strong emphasis... Show more

Ixchel Ruiz

Ixchel Ruiz

Ixchel Ruiz has been developing software applications and tools since 2000. Her research interests include Java, dynamic languages, client-side technologies, and testing. As a member of the JCP Executive Committee, Java Champion, Oracle ACE Pro, Testcontainers Community Champion, CDF Ambassador, Hackergarten enthusiast, Open Source advocate, public speaker, and mentor, Ixchel is deeply committed to fostering inclusive and collaborative tech communities. She actively mentors aspiring developers and champions initiatives aimed at increasing diversity and accessibility in the technology sector.

Ixchel’s work is characterised by a relentless pursuit of innovation, a deep understanding of user needs, and an unwavering commitment to ethical technology development.

Ixchel Ruiz has been developing software applications and tools since 2000. Her research interests include Java, dynamic languages, client-side technologies, and testing. As a member of the JCP Executive Committee, Java Champion, Oracle ACE Pro, Test... Show more

Sara Lozano Martí

Sara Lozano Martí

👋 Me presento, mi nombre es Sara y como buena millennial 🔝, mi trayectoria profesional se podría resumir en una gymkana laboral continua que me empuja a reinventarme y adaptarme al entorno socioeconómico que le ha tocado vivir a mi generación.

Por eso soy Técnica superior en sistemas de telecom. e informáticos 👩‍💻, Diplomada en Ciencias Empresariales 💰 y Power BI developer 📊 ¡Me apasiona fusionar las finanzas con las nuevas tecnologías! 💡

Me encanta romper la brecha digital allá dónde voy y participar en los procesos de adopción digital de las empresas. Por eso, también soy creadora de contenido y formadora de Power BI. Tengo un canal de Youtube en el que doy truquitos cortos sobre PowerBI: https://www.youtube.com/@KawaiiBI

También soy cibervoluntaria (https://www.cibervoluntarios.org/) e intento ayudar a otras personas que lo necesitan a romper la brecha digital para que este mundo tan avanzado no las deje fuera del juego💞.

He vendido lavadoras, he sido hostelera y en mi última vida laboral fui contable-fiscal pero ahora después de mucho practicar, mucho estudiar y mucho esfuerzo soy muy feliz trabajando de consultora de PowerBI, herramienta que me apasiona y que fusiona las finanzas, la tecnología y la formación, tres campos que me encantan. 😍💞

👋 Me presento, mi nombre es Sara y como buena millennial 🔝, mi trayectoria profesional se podría resumir en una gymkana laboral continua que me empuja a reinventarme y adaptarme al entorno socioeconómico que le ha tocado vivir a mi generación. ... Show more

Mihaela Gheorghe-Roman

Mihaela Gheorghe-Roman

Mihaela is an Experienced Software Architect at Systematic, Romania, and an Oracle ACE Associate for Java. Ph.D in artificial neural network algorithms, Assistant Professor at the University of Cybernetics and Informatics in Bucharest, she is a dedicated lead developer and architect who enjoys sharing her knowledge.

In her professional career, spanning over 14+ years, she worked for telecom and defence domains with a focus on Java, Spring Boot, C, C#, Scala and Angular.

Apart from her passion for programming, she loves parrots, she is enthusiastic about traveling the world and doing a lot of sports, from running at marathons, martial arts and to different aerobic trainings.

Mihaela is an Experienced Software Architect at Systematic, Romania, and an Oracle ACE Associate for Java. Ph.D in artificial neural network algorithms, Assistant Professor at the University of Cybernetics and Informatics in Bucharest, she is a dedic... Show more

Dinoy Raj

Dinoy Raj

Dinoy Raj is a Product Engineer and Android specialist with a deep focus on building scalable, high-performance mobile experiences using Kotlin and Jetpack Compose. Currently at Strollby, he architects multi-module B2B and B2C travel applications, specializing in unified design systems and complex booking infrastructures.

Recognized as one of the most active speakers of 2025 on Sessionize ranking in the top 3% of 71,000+ speakers globally Dinoy is a frequent face at international conferences. He has shared his expertise on On-Device AI, custom launchers, and modern Android architecture at Droidcon Abu Dhabi ’25, Droidcon Uganda '25, DevFest Dubai ’25, DevFest Mumbai ’25. Dinoy will be also Speaking at FOSSASIA 2026.

A pioneer in the mobile AI space, Dinoy has successfully integrated On-Device AI into production apps, leveraging Google Gemini Nano and the Prompt API to create "Smart Search" features and "Generative UI" frameworks. He is also the creator of Simple Launcher: Minimalist.

Dinoy Raj is a Product Engineer and Android specialist with a deep focus on building scalable, high-performance mobile experiences using Kotlin and Jetpack Compose. Currently at Strollby, he architects multi-module B2B and B2C travel applications, sp... Show more

Koen Verbeeck

Koen Verbeeck

Koen Verbeeck is a data professional working at AE. He helps organizations to get insight in their data and to improve their analytics solutions. Koen has over a decade and a half of experience in developing data warehouses, models and reports using the Microsoft data platform. Koen was a Microsoft Data Platform MVP for 8 consecutive years, and 1 year Microsoft Fabric MVP. He has a blog at http://www.sqlkover.com, writes articles for MSSQLTips.com and is a frequent speaker at Microsoft Data Platform events.

Koen Verbeeck is a data professional working at AE. He helps organizations to get insight in their data and to improve their analytics solutions. Koen has over a decade and a half of experience in developing data warehouses, models and reports using ... Show more

Please note that Sessionize is not responsible for the accuracy or validity of the data provided by speakers.

Most Active Speakers 2025

Every year, we put together a list of the most active speakers. This list features the top 3% of speakers who have participated in events using Sessionize during the 2025.

The 3% is calculated from the pool of all speakers that have at least one accepted session in year 2025. We don't include inactive speakers or speakers that had no accepted sessions during the year. There are around 39,000 unique accepted speakers this year, the 3% is 1163. Not all of them have their speaker profiles set as public, and we respect that, so the list doesn't show all of them.

The calculation is based on the number of accepted events, that's the main criteria, but to get more refined results we also look at things like multiple sessions per event, sharing a session with a co-speaker and how big the event is. Number of submissions and declined sessions don't affect the list.

Please note that the count of events and sessions in this list does not represent the number of events and sessions from the year 2025. Instead, it shows the number of events and sessions featured on the speaker's public speaker profile; these numbers have nothing to do with the award itself.